import java.net.DatagramPacket;
import java.net.DatagramSocket;
class Collector {
private final static int BUFSIZE = 20;
public static void main(String args[]) throws Exception {
int port = Integer.parseInt(args[0]);
DatagramSocket ds = new DatagramSocket(port);
while (true) {
byte buffer[] = new byte[BUFSIZE];
DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
ds.receive(dp);
System.out.println(new String(dp.getData()));
}
}
}
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